Question

Vaccines made now a days are safe .give scientific reason​

Answer 1

Answer:

vaccine made nowadays are safe as they have been tested on many peoples by the scientist

Answer 2

Answer:

Using this strategy, viruses are weakened so they reproduce very poorly once inside the body. The vaccines for measles, mumps, German measles (rubella), rotavirus, oral polio (not used in the U.S.), chickenpox (varicella), and influenza (intranasal version) vaccines are made this way

Explanation:

so vaccine are safe for us